I finished the story. I saved the game on 3 separate files and then did all 3 endings. My favorite is Option C. I won't reveal anything in order to avoid spoiling it for anyone else.

I'm going to start my 2nd play through, and this time actually attempt to achieve 100%. I wanted to do it this first time, but I really don't feel like trying to save $150 million to buy the golf course since I already went through all the assassination missions before finding out that I could've saved them for the end. FML